The book was published in 1982, so it obviously lacks information on current submarine designs of any navy. It provides reasonable information on the submarines of the WW I and WW II eras and also of the interwar period of the 1920s and 1930s.

The book discusses submarines of the British, German, US, Italian, and Japanese navies. It also describes the post-war US and Soviet nuclear submarines, especially the ballistic missile submarines. There is some discussion the British, Italian, and Japanese midget submarines of WW II